External Drive Inaccessible (Invalid argument)

Hello,

I’ve got a problem with kodi 17.0, installed on a raspberry pi 3 using retropie (raspbian based distrib).
I’m trying to share some folders of my external drive (using smb, Windows 8.0 X64), but whenever I try to access those from Kodi, I got this error “invalid argument”.
But what is really weird, is that Kodi does manage to see the residential group, does manage to access the list of shared folders, and can even browser folders from my local hard drive. But not the folders from my USB external hard drive.

I already tried to increase the IRPStackSize up to 32, but it didn’t change a thing. Moreover if I can access the local folders, I don’t think it’s a stack size issue.

Does anyone have an idea of what’s going ? Even a clue ?

Thanks for reading and even more thanks for answering

EDIT : got this error when trying to acces folders from TotalCommander (Android) : 0xC0000205 . Now that’s more helpful than “Invalid Argument”